• 한국철도학회:학술대회논문집
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• 한국철도학회 2003년도 춘계학술대회 논문집
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• pp.257-262
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• 2003

Now, the population and economical power is deeply concentrated to Seoul-metropolitan region, therefoere the provinces is so lagging behind and the country cannot get balance development. And, like metropolitan region, the more outer the living area of local wide-area city is spreading, the more serious wide-region transportation problems are. But the railroads near wide-area city fun seldom commuter train, so they cannot absorb the transportation demand of wide-area city metropolitan region. To solve above transportation problem, local wide- area cities try to make a subway or a light rail transit. But it is so difficult because the limit of public finance and original small capacity of light rail. In the paper, I propose 'Local city wide-area electric railways' system of the consortium of 'Local wide-city and province transportation union', Korean National Railroad (KNR) and local capital. A 'Local wide-city and province transportation union' operates commuter railways directly using the facilities of KNR, and local capital invests to the stations of above railways system. Therefore the commuter railway system around local wide-city region will be constructed quickly and the stations will be the strong point of local development and investment.

• 한국재료학회지
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• 제15권6호
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• pp.399-407
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• 2005

The effect of IN738 additive powder on microstructure and mechanical properties of the wide-gap region brazed with BNi-3 filler metal powder was investigated. The wide-gap brazing was conducted in a vacuum of $2\times10^{-5}torr\;at\;1200^{\circ}C$ with various powder mixing ratios of additive to filler powders. The microstructures of the wide-gap brazed region were analyzed by SEM and AES. The region brazed with only BNi-3 filler metal powder had a microstructure consisted of proeutectic, binary eutectic and ternary eutectic structure, while that brazed with a mixture of IN738 additive powder and BNi-3 filler metal powder had a microstructure consisted of IN738 additive powder, binary eutectic of $Ni_3B-Ni$ solid solution and (Cr, W)B. The fracture strength of the wide-gap brazed region was about 680 MPa regardless of the additive powder mixing ratios. Cracks were initiated at the (Cr, W)B and binary eutectic of $Ni_3B-Ni$ solid solution, and propagated through them in the wide-gap brazed region, which lowered the fracture strength of the region.

• Communications for Statistical Applications and Methods
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• 제26권1호
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• pp.35-46
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• 2019

Multivariate Confidence Region (MCR) cannot be used to obtain the confidence region of the mean vector of multivariate data when the normality assumption is not satisfied; however, the Quantile Confidence Region (QCR) could be used with a Multivariate Quantile Vector in these cases. The coverage rate of the QCR is better than MCR; however, it has a disadvantage because the QCR has a wide shape when the probability density function follows a bimodal form. In this study, we propose a Quantile Confidence Region using the Highest density (QCRHD) method with the Highest Density Region (HDR). The coverage rate of QCRHD was superior to MCR, but is found to be similar to QCR. The QCRHD is constructed as one region similar to QCR when the distance of the mean vector is close. When the distance of the mean vector is far, the QCR has one wide region, but the QCRHD has two smaller regions. Based on these features, it is found that the QCRHD can overcome the disadvantages of the QCR, which may have a wide shape.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 하계종합학술대회 논문집(1)
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• pp.195-198
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• 2002

One-dimensional radar signature, such as range profile, is highly dependent on the aspect angle. Therefore, radar target recognition over wide angular region is a very difficult task. In this paper, we propose the Bayes classifier with Gaussian mixture model for radar target recognition over wide-angular region and compare performances of proposed technique and radar target recognition with subclasses concept in the literature of probability of correct classification ratio.

• 한국지역지리학회지
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• 제21권3호
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• pp.450-460
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• 2015

이명박 정부가 출범하면서 시행된 광역경제권 사업은 적어도 동남권의 경우 매우 시의적절한 것이었다. 하지만 이 사업이 얼마나 성과적이었는지에 대해서는 의문이 적지 않다. 그간의 동남권광역경제발전위원회의 사업, 실적 등을 살펴 보건대 광역적 거버넌스 체계로서 성과가 매우 미흡하다고 하지 않을 수 없을 것이다. 동남권광역경제발전위원회는 운영상 많은 문제점을 가지고 있었다. 독자적인 인력을 거의 확보하지 못하였을 뿐 아니라 가용 예산이 미미하고 권한도 제한적이었다. 그러나 보다 중요한 한계는 그것의 성격과 기능이 제대로 정립되지 않았다는 점일 것이다. 그 결과 정권이 교체되면서 전국적으로 광역위원회는 폐지되고 말았다. 향후에도 동남권은 광역경제권의 수준에 부합하는 광역적 거버넌스가 요구되고 있다. 이 경우 신설될 기관의 주요 기능으로는 동남광역경제권에 대한 조사, 연구기능과 광역적 발전전략의 제안, 권고 등을 들 수 있을 것이다. 지역경제 및 도시 문제에 대한 조사 연구센터를 설치하여 지역의 경제적 상황을 상시적, 체계적으로 진단하고 현안 과제를 도출하도록 할 필요가 있다. 이 기관의 벤치마킹 모델로는 네덜란드의 레지오 란트스타트가 주목되는데, 란트스타트는 동남권의 도시체계 및 광역경제권과 유사성이 매우 높기 때문이다. 비교적 최근에 중앙정부에 의해 설립된 레지오-란트스타트는 행정구역을 넘어선 광역적 협력과 지역발전을 위한 연구 기능을 강화해 나가고 있다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2000년도 가을 학술발표회 논문집
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• pp.593-600
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• 2000

Most of ground investigations can be grasped geological distribution which like rock name, geological structure, soil condition, underwater condition, land slide, ground cave-in, ground collapse by geological survey. But geological survey is limited to part region geological structure, not wide region. Therefore, Image Processing Method must need to grasp wide region geological structure. The object of this research is presented analysis data of geotechnical engineering in first step investigation.

• 대한토목학회논문집
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• 제33권1호
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• pp.297-304
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• 2013

기후변화에 대응하여 수송부문의 탄소배출 저감노력이 세계적인 이슈가 되고 있다. 특히, 지역단위의 수송부문 탄소배출 저감전략의 수립 및 효율 집행을 위해서는 정밀한 탄소배출 인벤토리 구축은 필수적이나, 현재 도로교통의 특성과 수단의 다양성, 통행패턴의 복잡성 등 자료수집 한계로 신뢰성 있는 지역단위 인벤토리는 개략적 산정에 그치고 있는 실정이다. 본 연구는 이와 같은 문제점을 극복하기 위해 국가교통DB의 자료를 활용하여 지역단위 도로교통 탄소배출 인벤토리 구축 방법론을 제시하였다. 이를 위해 국가교통DB포함 자료 중 $CO_2$ 관련 속성을 파악하고, 이에 적합한 $CO_2$ 산정식을 도출하여 인벤토리 모형을 구축하였다. 구축된 모형의 적용성을 검토하기 위해 부산시를 사례로 2008년도 기준 도로부문의 탄소배출량을 산정하여 기존 연구결과와 비교분석하였다. 또한, 연구의 결과를 기초로 더욱 정밀한 인벤토리 구축을 위한 향후 연구방향을 제시하였다.

• 한국주조공학회지
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• 제22권5호
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• pp.252-256
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• 2002

Ni-Nb-Ti-Zr amorphous alloys were manufactured using melt-spinning methods. Amorphous formability, the supercooled liquid region before crystallization and mechanical properties were examined. The value of the reduced glass transition temperature and the supercooled liquid region of $Ni_{62}Nb_{10}Ti_{13}Zr_{15}$ alloy were relatively high and were 0.612 and 76 K respectively. However, amorphous bulk alloy rod was not formed using the Cu-mold die casting. The mechanical properties were in the range of $800{\sim}900DPN$ of hardness and $2.5{\sim}2.8$ GPa of tensile strength in the whole composition range.

• 한국전자파학회논문지
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• 제13권8호
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• pp.777-782
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• 2002

일반적인 시간 영역에서의 레이더 신호들은 표적의 관측각에 민감하게 변화한다. 따라서 대표적인 시간영역 레이더 신호인 1차원 range profile을 이용하여 구분실험을 하는 경우에 있어서 central moments와 PCA를 결합하여 먼저 특성벡터를 추출한 후 clustering 기법에 기반한 subclass concept을 사용하는 구분기를 사용하여 넓은 관측각에서의 표적인식 성능을 향상시킨 결과들을 보여준다.

• 지역사회간호학회지
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• 제27권4호
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• pp.327-336
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• 2016

Purpose: This study was to examine the clinical characteristics and mortality risk factors of geriatric hospital patients who visited one region-wide emergency department (ED). It's basically meant to develop criteria for the patient management of geriatric hospitals and to provide related information. Methods: A retrospective research study was implemented using electronic medical records. The subjects in this study included 484 geriatric hospital patients who were selected from among 15,994 patients that visited one region-wide ED between January 1, 2014, and December 31, 2015. Results: There were significant differences in death, a change for the better and no change for the better, which were results of treatment, according to the length of stay in hospital, hospitalization in a general ward, not having an operation or surgery, the presence or absence of malignant neoplasm, the insertion of foley catheter, intubation, ventilator and the insertion of central venous catheter. Conclusion: The results of this study suggest that a patient management system is necessary in geriatric hospitals and that competent healthcare workers who can properly respond to emergencies are required as well.